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Wear Behavior of Diamond-Coated Drawing Dies

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Transactions of Tianjin University 2011年第4期17卷 259-263页

作者：林子超孙方宏沈彬 School of Mechanical Engineering Shanghai Jiao Tong University

The failure behavior of diamond-coated die was investigated experimentally and analytically through finite element method (FEM) simulation in the present work. Diamond coatings were fabricated by straight hot filament chemical vapor deposition (CVD) passing through the interior hole of the drawing die using a mixture of hydrogen and acetone as source gases. The performance tests were made under real drawing condition. Scanning electron microscopy (SEM) was used for the study of coating wear after die service. The coating wear appears on two regions of the reduction zone: one is near the entrance where the contact begins, and the other is at the end of the reduction zone. FEM simulation was made for calculating the von Mises stresses distribution on the coating and substrate during the drawing process. The present work was of great practical significance for the improvement of drawing performance of diamond-coated drawing dies.

关键词： wire drawing diamond coating wear FEM simulation

Wavelength calibration and spectral analysis of vacuum ultraviolet spectroscopy in EAST

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Plasma Science and Technology 2024年第8期26卷 37-43页

作者：计华健张洪明吕波 Cheonho BAE 何梁林子超尹相辉沈永才戴舒宇 Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China Science Island Branch Graduate SchoolUniversity of Science and Technology of ChinaHefei 230031People’s Republic of China College of Electrical Engineering University of South ChinaHengyang 421001People’s Republic of China School of Physics and Materials Engineering Hefei Normal UniversityHefei 230601People’s Republic of China School of Physics Dalian University of TechnologyDalian 116024People’s Republic of China

A vacuum ultraviolet(VUV)spectroscopy with a focal length of 1 m has been engineered specifically for observing edge impurity emissions in Experimental Advanced Superconducting Tokamak(EAST).In this study,wavelength calibration for the VUV spectroscopy is achieved utilizing a zinc *** grating angle and charge-coupled device(CCD)position are carefully calibrated for different wavelength *** wavelength calibration of the VUV spectroscopy is crucial for improving the accuracy of impurity spectral data,and is required to identify more impurity spectral lines for impurity transport *** spectra of EAST plasmas have also been obtained in the wavelength range of 50–300 nm with relatively high spectral *** is found that the impurity emissions in the edge region are still dominated by low-Z impurities,such as carbon,oxygen,and nitrogen,albeit with the application of fulltungsten divertors on the EAST tokamak.

关键词： vacuum ultraviolet spectroscopy wavelength calibration impurity spectra

血糖、血脂和糖耐量试验诊断糖尿病的应用价值

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中国卫生标准管理 2022年第10期13卷 106-109页

作者：林自超厦门市第五医院检验科福建厦门361101

目的探讨空腹血糖、血脂和糖耐量试验在糖尿病诊断中的临床应用价值。方法选择2020年10月—2021年3月本院收治的糖尿病患者1103例作为观察组,另选择同时间段本院接收的健康体检者100例作为对照组,采取全自动生化分析仪进行空腹血糖、总... 详细信息

目的探讨空腹血糖、血脂和糖耐量试验在糖尿病诊断中的临床应用价值。方法选择2020年10月—2021年3月本院收治的糖尿病患者1103例作为观察组,另选择同时间段本院接收的健康体检者100例作为对照组,采取全自动生化分析仪进行空腹血糖、总胆固醇(total cholesterol,TC)、三酰甘油(triglyceride,TG)、高密度脂蛋白胆固醇(high density liptein cholesterol,HDL-C)、低密度脂蛋白胆固醇(low density lipoprotein cholesterol,LDL-C)检测和糖耐量试验,空腹血糖采取葡萄糖氧化酶方法,TC、TG采取氧化酶法,HDL-C、LDL-C采取直接检测法,比较两组血糖水平、血脂水平,依据WHO《糖尿病诊断标准》评价两组糖耐量异常率及糖耐量值。结果观察组空腹血糖及糖耐量值显著高于对照组(P<0.05)。观察组TC、TG,HDL-C水平显著高于对照组,LDL-C水平显著低于对照组(P<0.05)。观察组糖耐量异常率为99.27%,显著高于对照组的2.00%(P<0.05)。结论糖尿病患者空腹血糖水平高于正常水平,血脂指标异常,而且糖耐量异常率及糖耐量值高,可将血糖、血脂和糖耐量试验检验结果作为诊断依据,研究价值较高。

关键词：生化检验空腹血糖血脂糖耐量试验糖耐量值糖尿病

Inversion techniques to obtain local rotation velocity and ion temperature profiles for the x-ray crystal spectrometer on EAST

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Plasma Science and Technology 2023年第9期25卷 26-33页

作者：林子超张洪明王福地 Cheonho BAE 符佳金仡飞卢迪安傅盛宇李建康吕波 Institute of Plasma Physics HFIPSChinese Academy of SciencesHefei 230031People’s Republic of China Science Island Branch Graduate School of University of Science and Technology of ChinaHefei 230026People’s Republic of China School of Nuclear Science and Technology University of South ChinaHengyang 421001People’s Republic of China

Inversion techniques are conducted based on the tangential x-ray crystal spectroscopy(TXCS)geometry on EAST to obtain the local profiles of ion temperature(Ti)and toroidal rotation velocity(vt).Firstly,local emissivity profiles of the impurity argon are obtained using the asymmetrical Abel ***,the local vt and Ti profiles are calculated by considering the local emissivity profiles and the TXCS detailed *** addition,how the changes in the vt profiles affect the accuracy in the Ti profiles is discussed in *** is also found that the lineintegrated Ti profiles are becoming less accurate with the increase in the radial gradient in the local vt ***,accurate Ti radial profiles are reconstructed after considering the effects of the emissivity and velocity,which are verified by comparing the inverted vt and Ti profiles with those local profile measurements from the Charge eXchange Recombination Spectroscopy(CXRS)on EAST.

关键词： plasma toroidal rotation ion temperature x-ray crystal spectroscopy Abel inversion

基于正交试验的慢走丝电火花线切割加工的参数优化

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现代制造工程 2013年第10期 1-5,93页

作者：边留进林子超孙方宏郭松寿上海交通大学上海200240 苏州交钻纳米超硬薄膜有限公司苏州215021 上海交友钻石涂层有限公司上海200240

慢走丝电火花线切割作为一种重要的加工方式,广泛应用于高精度硬质合金模具的加工领域。材料去除率与表面粗糙度是电火花线切割加工中最重要的两项指标。通过正交试验法,研究了加工硬质合金模具时,慢走丝电火花线切割的加工参数(电流峰... 详细信息

慢走丝电火花线切割作为一种重要的加工方式,广泛应用于高精度硬质合金模具的加工领域。材料去除率与表面粗糙度是电火花线切割加工中最重要的两项指标。通过正交试验法,研究了加工硬质合金模具时,慢走丝电火花线切割的加工参数(电流峰值、放电脉宽时间、脉间时间、主电源电压、伺服电压和电解质水压力)对上述两项性能指标的影响,分析了影响性能指标的主次因素,并得到了最佳的参数配置。最后,在慢走丝电火花线切割机床上验证了所得到的优化参数是可行的。

关键词：慢走丝电火花线切割正交试验材料去除率表面粗糙度参数优化

基于自编码卷积神经网络的机床状态聚类技术分析

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机械设计与研究 2020年第3期36卷 141-147页

作者：刘启林子超沈彬刘奇正桂宇飞上海交通大学机械与动力工程学院上海200240

传统的机床故障诊断技术需要大量的、带标签的样本数据进行训练,而在实际工程当中,虽然可以获得海量的数据,但满足数量要求的带标签的样本数据是难以获得的。一种可行的思路是利用深度学习技术中无监督学习的方法对机床状态进行聚类,将... 详细信息

传统的机床故障诊断技术需要大量的、带标签的样本数据进行训练,而在实际工程当中,虽然可以获得海量的数据,但满足数量要求的带标签的样本数据是难以获得的。一种可行的思路是利用深度学习技术中无监督学习的方法对机床状态进行聚类,将对大量原始数据进行标签的问题简化为对若干类数据进行标签的问题。编制三组能够充分反映数控机床的设备状态的诊断程序,控制数控机床运行诊断程序,收集机床的运行数据,基于自编码卷积神经网络,无监督学习数据的内在特征,将原始数据降维至一定长度,利用SOM神经网络对所得特征向量进行聚类,实验结果表明,此方法能够很好的将机床的状态进行聚类,大幅度减少了工程人员对诊断数据进行标记所需花费的时间成本。

关键词：数控机床神经网络 SOM 状态聚类

生化检验在糖尿病诊断中的临床应用及其价值探讨

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糖尿病新世界 2022年第20期25卷 53-55,63页

作者：张焕棕林自超刘丽雅厦门市第五医院检验科福建厦门361101

目的探讨生化检验在糖尿病诊断中的临床应用及其价值。方法选取2021年1—12月厦门市第五医院收治的240例疑似2型糖尿病患者作为研究对象,均给予尿常规检验和生化检验,并以临床诊断结果为金标准,对比检验方式的诊断效能。结果临床诊断结... 详细信息

目的探讨生化检验在糖尿病诊断中的临床应用及其价值。方法选取2021年1—12月厦门市第五医院收治的240例疑似2型糖尿病患者作为研究对象,均给予尿常规检验和生化检验,并以临床诊断结果为金标准,对比检验方式的诊断效能。结果临床诊断结果为120例2型糖尿病患者,生化检验结果显示,阳性119例,阴性121例;尿常规检验结果显示,阳性127例,阴性113例。生化检验在诊断敏感性96.67%、特异性97.50%、准确性97.08%、阳性预测值97.48%、阴性预测值96.69%均明显高于尿常规检验73.33%、67.50%、70.42%、69.29%、71.68%,差异有统计学意义(χ^(2)=10.334、13.010、10.667、12.819、10.501,P<0.05)。结论生化检验在糖尿病诊断中的敏感性、特异性及准确性高,能为临床诊治提供可靠依据。

关键词：糖尿病生化检验临床应用诊断价值

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Suppression of the G-sensitive drift of laser gyro in dual-axis rotational inertial navigation system

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Journal of Systems Engineering and Electronics 2021年第4期32卷 822-830页

作者： YU Xudong WANG zichao FAN Huiying WEI Guo WANG lin College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China

The dual-axis rotational inertial navigation system(INS)with dithered ring laser gyro(DRLG)is widely used in high precision *** major inertial sensor errors such as drift errors of gyro and accelerometer can be averaged out,but the G-sensitive drifts of laser gyro cannot be averaged out by indexing.A 16-position rotational simulation experiment proves the G-sensitive drift will affect the long-term navigation error for the rotational INS *** vibration coupling and asymmetric structure of the DRLG are the main errors.A new dithered mechanism and optimized DRLG is *** validity and efficiency of the optimized design are conformed by 1 g sinusoidal vibration *** optimized inertial measurement unit(IMU)is formulated and measured *** and vehicle experimental results show that the divergence speed of longitude errors can be effectively slowed down in the optimized *** long term independent navigation,the position accuracy of dual-axis rotational INS is improved close to 50%,and the G-sensitive drifts of laser gyro in the optimized IMU are less than 0.0002°/*** results have important theoretical significance and practical value for improving the structural dynamic characteristics of DRLG INS,especially the highprecision inertial system.

关键词： inertial navigation rotational inertial navigation system(INS) laser gyro G-sensitive drift

EAST托卡马克激光吹气杂质注入系统控制系统设计及测试

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核技术 2023年第12期46卷 55-64页

作者：范玉赵宇红张洪明吕波林子超沈永才尹相辉王福地符佳计华健曾超毛立宇孙波南华大学电气工程学院衡阳421001 中国科学院合肥物质科学研究院等离子体物理研究所合肥230031 中国科学技术大学研究生院科学岛分院合肥230031 合肥师范学院物理与材料工程学院合肥230601

开展托卡马克等离子体中杂质输运与杂质控制研究对于提升等离子体约束性能与保障装置安全有重要意义。为了在EAST(Experimental Advanced Superconducting Tokamak)托卡马克装置上开展杂质输运研究,需要发展一套用于注入示踪杂质粒子的... 详细信息

开展托卡马克等离子体中杂质输运与杂质控制研究对于提升等离子体约束性能与保障装置安全有重要意义。为了在EAST(Experimental Advanced Superconducting Tokamak)托卡马克装置上开展杂质输运研究,需要发展一套用于注入示踪杂质粒子的激光吹气(Laser Blow-off,LBO)微量杂质注入系统。本文描述了一种用于EAST托卡马克装置上LBO系统的控制系统设计过程与测试结果。该系统采用了全新的自动控制流程,使得系统可以重复、定量地向EAST等离子体注入不同元素的示踪杂质粒子。该设计通过STM32单片机系统实现对聚焦透镜位移、激光器被触发时刻的准确控制,且激光光斑直径可调,以改变杂质注入量。测试结果显示,系统能快速检测到外触发信号并实现精确定时,激光光斑聚焦位置误差小于0.40 mm,达到激光吹气杂质注入实验要求。本研究对在EAST装置上开展等离子体杂质输运研究具有重要意义。

关键词：激光吹气杂质注入系统杂质输运 STM32 控制系统